Hypoxia-Ischemia, BrainAnoxiaNeuroprotective AgentsAnimals, NewbornHypoxia, BrainIschemiaBrain IschemiaPlethysmography, Whole BodyCell HypoxiaRats, Sprague-DawleyPia MaterHypercapniaMyocardial IschemiaHypotensionBrainCell DeathDisease Models, AnimalNeuronsRats, WistarCerebrovascular CirculationReperfusion InjuryInfarction, Middle Cerebral ArteryIschemic Attack, TransientGerbillinaeOxygenFetal HypoxiaIschemic PreconditioningTime FactorsReperfusionHippocampusHypoxia-Inducible Factor 1, alpha SubunitMyocardial Reperfusion InjuryCell Survival